WPS-4000

WPS-4000
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Company	Whelen Engineering

The WPS-4000 Series is a line of rotating,electronic sirens produced by Whelen Engineering. The last digit of the model number indicates the number of 400-watt drivers installed. The 4004 and 4003 are identical in design, while the discontinued and very uncommon 4008 is taller and has twice the number of horns. Older siren heads have a larger, rectangular rotator housing that contains a belt-driven mechanism. New sirens are equipped with a gear-driven rotator in a smaller, square housing. Whelen offered a kit to retrofit the newer, direct-drive rotator onto older siren heads. Fins were also affixed to some of the early ("finback") units.

Model	Image	Output dBc	Drivers	Product Sheet
WPS4003		127	3x400W	WPS4003
WPS4004		129	4x400W	WPS4004
WPS4008		130	8x400W	WPS4008

Vortex-R

Much like the Omni-Alert Series, Whelen offered the 4003/4004 siren head in a reduced-cost configuration with a lesser feature set. These sirens are advertised as tone-only with no voice capabilities. They are identifiable from their more capable brethren by the smaller, single-door Type-I control cabinet. It is also possible that all Vortex units have the newer, direct-drive rotator.

Model	Image	Output dBc	Drivers	Product Sheet
VORTEXR1		?	1x400W	VORTEXR1
VORTEXR2		124	2x400W	VORTEXR2
VORTEXR3		127	3x400W	VORTEXR3
VORTEXR4		129	4x400W	VORTEXR4